Seccubus automates regular vulnerability scans with Nessus and OpenVAS and provides delta reporting
Seccubus runs vulnerability scans at regular intervals and compares the findings of the last scan with the findings of the previous scan. The delta of this scan is presented in a web GUI when findings can be easily marked as either real findings or non-issues. Non issues get ignored until they change. This causes a dramatically reduction a analysis time.
Get it via http://sourceforge.net
More info about this tool:http://seccubus.com